<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity {

    /**
     * Authenticates a user.
     * The example implementation makes sure if the username and password
     * are both 'demo'.
     * In practical applications, this should be changed to authenticate
     * against some persistent user identity storage (e.g. database).
     * @return boolean whether authentication succeeds.
     */
    private $_id;

    public function authenticate() {
        $pass = $this->password;
        $user = $this->username;
        $command = Yii::app()->db->createCommand("SELECT * FROM users WHERE '$user' = username");
        $results_users = $command->queryRow();
        if ($results_users) {
            $command = Yii::app()->db->createCommand("SELECT * FROM users WHERE SHA2('$pass',512) = password");
            $results = $command->queryRow();
            if ($results) {
                $this->errorCode = self::ERROR_NONE;
                $this->_id = $results['username'];
            } else
                $this->errorCode = self::ERROR_PASSWORD_INVALID;
        } else
            $this->errorCode = self::ERROR_USERNAME_INVALID;

        fb::log($this->errorCode);
        return !$this->errorCode;
    }

    public function getId() {
        return $this->_id;
    }

}